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2003 Course Basic Mechanical Eng.

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Total No. of Questions : 12] [Total No. of Printed Pages : 4 [3661]-13 F. E. Examination - 2009 BASIC MECHANICAL ENGINEERING (2003 Course) Time : 3 Hours] [Max. Marks : 100 Instructions : (1) Answers to the two sections should be written in separate books. (2) Black figures to the right indicate full marks. (3) Neat diagrams must be drawn wherever necessary. (4) Use of logarithmic tables, slide rules, mollier charts, electronic pocket calculators and steam tables is allowed. (5) Assume suitable data, if necessary. SECTION - I UNIT - I Q.1) (A) Define and explain the following terms : [08] (1) System (2) Surroundings (3) Property (4) State (B) State and explain Zeroth Law of Thermodynamics. What is its use ? [06] (C) If air pressure in an automobile tyre shown by gauge is 2.8 bar, and barometer reads 680 mm of mercury, calculate the absolute air pressure in kPa. [04] [3661]-13 OR 1 P.T.O. Q.2) (A) What is Continuity Equation ? [04] (B) What is Internal Energy ? Elaborate it further. [06] (C) In a reversible process of a closed system, undergoes a process pvn = c. If heat transferred is +15kJ, and change in internal energy is +45kJ, P1 = 1.4 bar, P2 = 8.4 bar, V1 = 0.15 m3 and V2 = 0.0357m3. Find out the value of index n , workdone with significance of its sign. [08] UNIT - II Q.3) (A) Give two applications of steam and how it is produced ? [04] (B) List different Water Turbines and explain any one of them with neat sketch. [06] (C) Explain working of 4 stroke diesel engine with neat sketches. [06] OR Q.4) (A) Define a Power Absorbing Device and classify the following devices as power producing or power absorbing : [04] (1) Centrifugal Water Pump (2) Steam Turbine (3) Air Compressor (B) Explain construction and working of Vane Blower with neat sketch. [06] (C) Explain construction and working of Domestic Refrigerator with neat schematic diagram. [06] UNIT - III Q.5) (A) List different renewable and non-renewable sources of Energy. [04] (B) Explain construction and working of a Hydroelectric Powerplant with a neat sketch. Name two such plants in India. [06] (C) Explain construction and working of Nuclear Powerplant. Give its two advantages. [06] OR [3661]-13 2 Contd. Q.6) (A) List different modes of Heat Transfer and respective governing laws. [04] (B) Obtain an expression for neat conduction in a hollow cylinder and further write expression for thermal resistance. [06] (C) A cold storage door of size 2m 1.5m., consists of 2 and 6 mm. thick glass sheets, separated by an air gap of 2mm. The cold storage inside temperature is 20oC. The outside atmospheric air temp. is 30oC. The convective heat transfer coefficient between glass and air is 23.2 Watts/m 2K; Kglass = 0.75 Watts/mK and Kair = 0.02 Watts/mK, Neglect convection effects in air gap. Find, heat transfer through door, mentioning its direction. [06] SECTION - II UNIT - IV Q.7) (A) Draw neat labelled block diagram of lathe machine and explain function of following parts : [08] (1) Bed (2) Head Stock (3) Tail Stock (4) Carriage (B) Explain Pillar type drilling machine with neat sketch. [06] (C) State the advantages and disadvantages of CNC Machines. [04] OR Q.8) (A) (B) (C) [3661]-13 Explain TIG Welding with neat sketch. State its advantages over Manual Metal Arc Welding. [08] What is Resistance Welding ? Explain the procedure of Resistance Welding with neat sketch. [06] Differentiate between Arc Welding and Gas Welding. [04] 3 P.T.O. UNIT - V Q.9) (A) Explain steps involved in Design Procedure. [06] (B) State and explain any three Press Working Operations. [06] (C) Explain the procedure adopted during selection of the material for engineering purpose. [04] OR Q.10) (A) Explain Aesthetic and Ergonomic Considerations in Design. [06] (B) Differentiate between Unilateral and Bilateral Tolerances. [04] (C) State and define any six Material Properties. [06] UNIT - VI Q.11) (A) Draw sketch of Single Plate Clutch and explain its working. [06] (B) Differentiate between Individual Drive and Group Drive. [04] (C) Compare Flat Belt and V-Belt. [06] OR Q.12) (A) Explain the working of any centrifugal governor with diagram. [06] (B) Explain the working of Bush Bearing with sketch. (C) State advantages and disadvantages of Chain Drive over Belt Drive. [06] [3661]-13/4 [04]

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